Locking device for slide fasteners



June 7, 1932.

s. H. NORTON LOCKING DEVICE FOR smnn FASTE'NBRS Filed May 31, 1930 IN V EN TOR. Samuel HNarton.

ATTO EYS.

. ingspecifica Patented June 7, 1932 UNITED STAT S PATENT OFFICE SAIUEI: H. HORTON, F IEADVII'JLE, PENNSYLFANIL I Looms nnvr'cn "son; shins ras'ransns Application Med May 31,

My invention relates toslide fasteners and wearing apparel, there is a tendency for the a slider to slip back along the stringers and permit the fastener to open up, unless means are provided to prevent such slipping movement. 1 I

Various slider locking devices have been to heretofore proposed to maintain the fastenerclosed by preventing relative movement between the slider In one practical embodiment of such locking devices, an opening is cut in the wing 2 of the slider and-a prong or lug on the slider actuating member orpull projects through the opening into engagement with the fastener elements in one position of thepu-ll. These locking devices are exceedingly simple 2 in construction and have-been found satisfactory in articles where the slider is moved upwardly to close the fastener and downwardly to open the fastener or even when the fastener is arranged in approximately a horizontal position. However, whensuch locking devices are applied to articles where thefastener is in an upside down position wherein the slider isdisposed at the lower end of the fastener when closed, there will be a tend-- ency for the pull to swing downwardly out of locking position.

One of the objects of my. invention is there'- fore to provide a. very simple and effective retaining means for holdilfifi thepull in lock- 7 ing position the uence of gravity or accidental placement in any position of the fastener. 1

Another object of the invention is to provide a resilient connection between the locking device and its point of attachment to the slider and to incorporate such feature in a slider lock of the type above mentioned. 1

Other objects and advantages of the in.

' ally in the follow-- ventio'n will appear more f tion.

fasteners are applied and fastener stringers.

mo. 8....1 no. 457,847.

In the accompanying drawing, 1 have. shown for purposes of illustration one embodiment andtwo modifications thereof which my invention may assume in practice.

In the drawing: I 3

Fig. 1 is a face view of a portion of a slide fastener with its openend disposed downwardly or in an upside down position and having my improved locking device associated therewith. .1 I

4 Fig. 2 is a side view of a slider constructed according to my invention.

Fig. 3 is a transverse sectional view through the slider and fastener on line 33 ofFig.1.' all. Fig. 4 is a perspective view illustrating the 1 pull made according to my invention.

4 Fig. 5 is a viewfof a part of the pull in the reverse position from-that shown in Fig. 4.

- Fig. 6 is a perspective view of the shder 1 with the pull removed. v Fig. 7 1s a longitudinal sectional view on line 7-7 of Fig. .3.

Fig.8 is a fragmentary view of a portion,

ofthe pull" similar to Figafishowin'g a modification. I y

Fig. 9 is a similar view of the pull showing another modification. Fig. 10 is a longitudinal section illustrating a still further modification.

Fig. 11 is a perspective view of the slider and pull member showing the pull construc tion of Figs. 9 and 10, collectively inthe same dev ce. p

The fastener may. be of any known type and as illustrated in Fig. 1, comprises a pair of fabric stringers 10 and 11 having endwise engaging fastener elements .12 and 13 secured .to their adjacent lon 'tudinal edges. The detailed construction 0 these fastenerelements will not be included here it being deemed sufficient to make. reference. to'the atent to Gideon Sundback No. 1,219,881,

" The slider comprises spaced upper and"? rch-.20, 19175 which shows an early example of this type gral pull attaching lug 19 formed thereon at any suitablepoint. As best seen in Fig. 3, this lug 19 is indented on opposite sides as at 20 and 21 to form recesses for receiving the pivot extensions 22 and 23 on the pull. The pull is preferably formed of a. flat piece of sheet metal blanked to the desired shape and along one edge has a slit 24 providing a spring-like locking member having a locking projection or lug 25 which extends at substantially right angles to the pull and projects through an opening 26 in the top wing of the slider, and engages in the spaces between the lockingmembers 12 to lock the slider against movement relative to the fastener elements. The action of the spring-like locking member will be readily understood. As shown in Fig. '7 when the slider stops at certain points and the pull is depressed into locking position, the prong 25 may engage on the edge of one of the fastener elements and will ride over it, at the same time flexing the spring-like extension 24a. Now upon a .slight movement of the slider, it will be readily seen that the flows into this dentations or recesses 20 and 21 in "detent may be formed as in Figs.

;metal from the ing out looking tongue will snap into engagement with one of the spaces between the fastener elements securely locking the slider. The spring-like extension is conveniently formed by providing a slitapproximately parallel to lockin point 25 is'located substantially in line with the. ivotal axis of the pull instead of extending eyon'd the pivot from the body of the pull.

In order to retain the pull 15 in looking position when applied to a fastener where the 0 en end is down, such as in corsets and the .l e, a detent 27 is formed on the end of the ;pull adjacent its pivotal axis and preferably ug. This 4 and 5'by asuitable punch and die which displaces the pull after forming and leaving the recess-28.

As shown in Fig. 8 the detent is formed in a slightly different manner. .In the blanknchefor the pulls, a small recess is formed in'the. punch die and the metal simply a recess during'the punchin action to form the detent projection 29. hus no substantial recess corresponding to the recess 28 is formed on the pull and its visible. surface remains smooth.

The action of this detent projection will now be pointed out. When the pull is depressed this' projection will cam over the very close to the pull attaching smooth surface of the slider and the inner. extensions- 22 and 23 of the pull will bear' ,the beveled top ,surfaces of the inthe pullattaching lug, thus causing the bifurcated end of the pull to spring apart slightly. A

one side edge of the pull and preferably the pull pivotally attached to said spring effect is thus obtained which will cause the the pull to snap down a and be held effectively in loom position. f

In the modification shown in tent member 31 is formed as a part of a spring tongue 32 formed by slitting the pull at 33 on the opposite side of the pivot from the slit 24.- A more flexible spring action is thus obtained on the retaining detent and it will not wear as much as the detent 27.

.As a result of my invention it will be observed that. an improved and simplified means has been provided for retaining the pull of a slide fastener in looking position regardless of whether or' not the fastener is disposed with its open end downwardl It will also be seen that an improved locfiing tongue has been provided which will snap into the spaces between the fastener elements and not be liable to break oil; also that the locking point or prong is disposed on the transverse line of pivot of the pull whereby it will swing'in a smaller arc than in some former constructions where the locking lug was located at the rear of the pivot.

In Fig. 10.the locking device is modified by providing a comparatively long spring tongue 34 which is bent up to form a curved engaging end 35 in the nature of afriction shoe. Such friction shoe maybe made to engage more than one fastener element if gltiasiired and provides an effective lock for the While I have in this application cal! w 'ch my the slider 9 the de- 1. In a slide fastener, cooperating series of '7 fastener elements, a slider foren 1 1 and 1m releasing said elements, a slider l :a| device to prevent unintended movement 0 the slider relative .to the rs, a member pivoted to the slider connected to said lockmg device for controlling'j'the same, and a spring tongue on said pivoted memberwhich cooperates with saidslider to retain said pivoted member in looking 'tion against accidental displacement.

. 2. In a slide fastener, cooperating series of fastener elements, aslider movable along said elements to engage the'same, a sheet metal slider, a spring extension along one side i of said pull comprising a tongue inte y joined to the pull at one .end and separated from the body of the pull by a longitudinal slit, and a lockadapted to project through an opem'ng of the slider into engagement with said fastener mg projection on said spring extension elements to prevent opening movement of the slider.

-3.. In a slide fastener, cooperating series said slider operatively connected to said pull so as to be moved to locking position when the pull is pushed against the slider, a pull retaining detent on said ull adapted to bear against the slider to ho d the pull in looking position, a lug on said slider having inclined surfaces, and pivot extensions on the bifurcated end of the pull cooperating .with said inclined surfaces to spring apart said hifurcated end when the pull is moved to locking position.

4. In a slide fastener, cooperating series of fastener elements, a slider movable along said elements to engage and release the same, a pull pivoted on the slider, a locking projectionon said pull adjacent. its pivot adapted to swing into engagement with said fastener elements to lock the slider in inoperative position of the pull, and a spring tongue carried by said pull having its free end adjacent sa1d pivot adapted frictionally to en gage the slider to retain said pull in locking position. I

- In testimony whereof I aflix my signature.

SAMUEL H. NORTON. 

